import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

public class Test1 {
    public static void main(String[] args) throws IOException {
        File file = new File("./test");
        file.getAbsolutePath();
        Writer writer = new FileWriter("./test");
        writer.write("c");

    }
}
